India's rooftop solar story is, on the headline numbers, a triumph. The PM Surya Ghar: Muft Bijli Yojana has crossed 9.5 GW by March 2026, financed roughly a million homes, and put the country on track for its one-crore-household target. Launched in February 2024, it has already delivered more than four-fifths of all rooftop solar installed in the previous decade. It is, without exaggeration, the world's largest domestic rooftop solar programme.
The headline, however, hides the geography. Gujarat alone accounts for nearly 3 lakh systems. Maharashtra, Uttar Pradesh, and Kerala follow. The hill states — Himachal Pradesh, Uttarakhand, Sikkim, the North-East, Ladakh — barely register on the dashboard. This, despite the fact that these regions enjoy some of the best solar irradiance in the country. A test site in Ladakh has been measured to outperform locations in Rajasthan and Madhya Pradesh on capacity utilisation. The sun, it turns out, shines brightest where we are building least. That is not an accident of geography. It is an outcome of policy design.
A Different Kind Of Rooftop
The first reason hill states lag is physical. A panel that works flawlessly on a Surat rooftop faces a different reality at 2,500 metres in Kinnaur or 3,500 metres in Leh. Snow burying panels for weeks at a time can drop generation to near zero — exactly when households need power most. Sub-zero winters punish lead-acid batteries and inverters that no specifications sheet expected to operate at minus twenty. The pitched slate and stone roofs of traditional homes, designed centuries ago to shed snow, do not take the standard mounting kits used on plains rooftops. The thick-walled, low-ceilinged homes of Spiti and Lahaul were built for thermal mass, not photovoltaic loads.
The second reason is logistical, and it cascades into economics. A panel that costs around ₹25 per watt landed in Lucknow can cost 60 to 80 per cent more by the time it reaches a Lahaul village by truck, mule, and porter — often during the narrow window between snowmelt and the next storm. A failed inverter in November can mean a five-month wait for replacement. Few empanelled vendors will send teams to villages where the road is open six months a year.
The Scheme Was Not Designed For The Mountains
The third reason — and the one nobody in policy portals wants to say out loud — is that the scheme itself was not designed for the mountains. PM Surya Ghar is, by construction, a programme for grid-tied individual households with reasonably reliable distribution networks, smart meters, sanction loads on file, and clean ownership documents. That is the right model for Jodhpur and Coimbatore. It is the wrong model for a hamlet of forty homes at the end of an 11kV feeder that loses voltage every monsoon, where many households hold land under traditional tenure that no government portal recognises, and where the local transformer cannot accept reverse power flow even if a homeowner manages to install a system.
The Ministry of New and Renewable Energy has acknowledged the asymmetry — applicants in Himachal, Uttarakhand, Ladakh, Jammu and Kashmir, the North-East, and the island Union Territories receive a 10 per cent additional central subsidy. Ten per cent. To close a 60 to 80 per cent cost gap. To pay for the steeper-tilt mounting that lets snow self-shed, the larger battery the local feeder forces on the system, and the technician training that would make these systems repairable in winter. The numbers do not add up, and everyone who has worked on the ground knows it.
This is not a small bureaucratic oversight. It is the logical outcome of building a national scheme around the assumptions of plains urbanisation and bolting on a token uplift for the rest. It also reflects a quieter political reality: population concentration areas seem to have an advantage vis-à-vis the Himalayas.
The Quiet Inequity
The result is a quiet inequity, and it is worth naming. The richest solar resource in the country is being captured least by the people who live above it. Households in the plains, with reasonably reliable grid backup, are getting subsidised solar. Households in the hills — where every kilowatt-hour displaces kerosene, diesel, and firewood, and where the black carbon from those fuels is settling on glacier surfaces and accelerating their melt — are not. The plains are being subsidised to switch from cleaner to cleaner. The hills are being left to burn the dirtiest fuels in the system, on top of the very ice that feeds the Ganga, the Yamuna, the Sutlej, and the Brahmaputra.
That is not an absolute climate action programme. That is a programme which substantial redesign to address areas where the climate stakes are highest.
A Himalayan Variant, Not A Himalayan Footnote
Pilot work by the India Smart Grid Forum, IIT Bombay's Grid Integration Lab in Kerala, and IUCN-supported demonstrations in Uttarakhand, Himachal, and Sikkim under the National Mission on Himalayan Studies show that decentralised solar in mountain villages works — when it is designed for the conditions. Spiti is being studied for a one-gigawatt utility-scale plant precisely because the resource is so good. The technology is not the bottleneck. The policy delay to redesign the product is.
What that redesign should look like is no longer a mystery:
Hybridise by default: Almost no Himalayan rooftop system should be solar-only. Pair it with battery storage and, where wind or micro-hydro is feasible, with those too. The economics only close when the household actually has electricity through January.
Cluster and share: Individual rooftop ownership is the wrong unit in many hamlets. Panchayat-anchored or cooperative-anchored microgrids — five to fifty homes sharing inverters, storage, and a single maintenance contract — collapse per-household costs and create a viable local job in the bargain. It will help the small and marginal farmers in the hills reduce their vulnerability to climate change.
Localise the workforce: Every state procurement contract should mandate that a fixed share of installation and operations roles be filled by trained local youth. India's solar skilling has been rightly criticised for producing certificates without jobs. Tying that training to mountain procurement fixes both problems at once and keeps the value local instead of letting it walk back down to the cities.
Build a Himalayan variant of PM Surya Ghar: A dedicated track with subsidy intensity that actually closes the cost gap — 75 per cent for systems up to 3 kW is a defensible starting point — simplified documentation that recognises traditional tenure, mandatory hybrid-with-storage design, multi-year operations and maintenance written into vendor contracts, and a ring-fenced empanelment of installers willing to operate above 2,000 metres. The state nodal agencies — HIMURJA, UREDA, LREDA — should lead the redesign, not implement someone else's.
The Policy Question
The Himalayas are not a marginal case in India's energy transition. They are the headwaters of every major north Indian river, the front line of the climate change we keep telling international audiences we are leading on, and the strategic frontier we deploy thousands of soldiers to defend. We can subsidise solar panels in cities and call it a climate policy, or we can subsidise solar panels in Zanskar and call it a climate policy. We cannot keep doing the first and pretend it is the second.
Black carbon from the diesel and firewood the hills are being left to burn is, in a real and measurable sense, melting the water security of the plains. A rooftop solar revolution that stops at the foothills will, in time, be remembered not for the million homes it lit but for the glaciers it failed to save.
The sun is already there. The question is whether the policy is willing to climb.
The authors write on sustainability. Views are personal.